add reduce-bitrate script

reduce_bitrate.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+
+# Define the target bitrate
+TARGET_BITRATE="192k"
+
+echo -e "\n\033[1;32mStarting Bitrate Reduction Script...\033[0m"
+echo -e "\033[1;34mTarget Bitrate: \033[0m${TARGET_BITRATE}"
+
+# Function to process MP3 files safely
+process_directory() {
+    local DIR="$1"
+    echo "Scanning Directory: $DIR"
+
+    # Use find with -print0 + read -d '' → null-separated = safe with any filename
+    while IFS= read -r -d '' file; do
+        echo "Processing: $file"
+
+        # Get current bitrate
+        METADATA=$(ffprobe -v error -select_streams a:0 -show_entries stream=bit_rate \
+            -of default=noprint_wrappers=1:nokey=1 "$file" < /dev/null 2>/dev/null)
+
+        if ! [[ "$METADATA" =~ ^[0-9]+$ ]]; then
+            METADATA=$(ffprobe -v error -show_entries format=bit_rate \
+                -of default=noprint_wrappers=1:nokey=1 "$file" < /dev/null 2>/dev/null)
+        fi
+
+        if ! [[ "$METADATA" =~ ^[0-9]+$ ]]; then
+            echo -e "\033[1;31mError:\033[0m Could not read bit rate for $file. Skipping."
+            continue
+        fi
+
+        CURRENT_BITRATE=$((METADATA / 1024))
+        echo -e "\033[1;32mCurrent Bitrate:\033[0m ${CURRENT_BITRATE} kbps"
+
+        if [ "$CURRENT_BITRATE" -le "${TARGET_BITRATE%k}" ]; then
+            echo -e "\033[1;33mInfo:\033[0m Already at or below target. Skipping."
+            continue
+        fi
+
+        # Create backup
+        BACKUP_FILE="${file%.mp3}.bak"
+        if [ ! -f "$BACKUP_FILE" ]; then
+            cp "$file" "$BACKUP_FILE"
+            echo -e "\033[1;32mBackup created:\033[0m $BACKUP_FILE"
+        fi
+
+        # Convert safely using a temporary file with full path
+        TEMP_FILE="${file%.mp3}_temp_$$.mp3"
+
+        if ffmpeg -nostdin -y -i "$file" -b:a "${TARGET_BITRATE}" -id3v2_version 3 "$TEMP_FILE" > /dev/null 2>&1; then
+            mv "$TEMP_FILE" "$file"
+            echo -e "\033[1;32mProcessed \033[0m$file \033[1;32mto ${TARGET_BITRATE} ✅\033[0m"
+        else
+            echo -e "\033[1;31mError:\033[0m ffmpeg failed for $file"
+            rm -f "$TEMP_FILE"
+        fi
+
+    done < <(find "$DIR" -maxdepth 1 -type f -name "*.mp3" -print0)
+}
+
+# ==================== MAIN ====================
+
+# Calculate total size before
+TOTAL_SIZE_BEFORE=$(find . -name "*.mp3" -print0 | xargs -0 stat -c '%s' 2>/dev/null | \
+                    awk '{sum += $1} END {printf "%.2f MB\n", sum/1024/1024}')
+echo -e "\n\033[1;32mTotal MP3 size before:\033[0m ${TOTAL_SIZE_BEFORE:-0.00 MB}"
+
+# Process every directory (including .)
+while IFS= read -r -d '' dir; do
+    process_directory "$dir"
+done < <(find . -type d -print0)
+
+# Calculate total size after
+TOTAL_SIZE_AFTER=$(find . -name "*.mp3" -print0 | xargs -0 stat -c '%s' 2>/dev/null | \
+                   awk '{sum += $1} END {printf "%.2f MB\n", sum/1024/1024}')
+
+echo -e "\n\033[1;32mTotal MP3 size after:\033[0m ${TOTAL_SIZE_AFTER:-0.00 MB}"
+echo -e "\n\033[1;32mBitrate Reduction Script Complete! 🎉\033[0m"
+
+# Optional: remove all .bak files at the end
+# find . -name "*.bak" -type f -delete